Goal:
  
  A : Type
  B : Type
  C : Type
  R : nat → A → C → Type
  g : A → B → C
  x : A
  xs : list A
  ih : ∀ (l' : list B) (k : nat),
         All2i (λ (i : nat) (x : A) (y : B), R i x (g x y)) k xs l'
         → All2i R k xs (map2 g xs l')
  y : B
  ys : list B
  k : nat
  z1' : nat
  z1'0 : list A
  z1 : list B
  z : All2i (λ (i : nat) (x : A) (y : B), R i x (g x y)) z1' z1'0 z1
  ============================
   ({| pr1 := k; pr2 := {| pr1 := x :: xs; pr2 := y :: ys |} |} =
    {| pr1 := z1'; pr2 := {| pr1 := z1'0; pr2 := z1 |} |}
    → let H := CoreTactics.block in
      let H0 := CoreTactics.block in All2i R (S k) xs (map2 g xs ys))


DEBUG:Going to execute:
destruct p || (case p; clear p)
Level 4: evaluation of term
raised the exception
Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2i
                                     (λ (i : nat) (x : A) (y : B),
                                        R i x (g x y)) z1' z1'0 z1)"
in
environment:
A : Type
B : Type
C : Type
R : nat → A → C → Type
g : A → B → C
x : A
xs : list A
ih : ∀ (l' : list B) (k : nat),
       All2i (λ (i : nat) (x : A) (y : B), R i x (g x y)) k xs l'
       → All2i R k xs (map2 g xs l')
y : B
ys : list B
k, z1' : nat
z1'0 : list A
z1 : list B
z : All2i (λ (i : nat) (x : A) (y : B), R i x (g x y)) z1' z1'0 z1


Level 3: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2i
                                     (λ (i : nat) (x : A) (y : B),
                                        R i x (g x y)) z1' z1'0 z1)"
in
environment:
A : Type
B : Type
C : Type
R : nat → A → C → Type
g : A → B → C
x : A
xs : list A
ih : ∀ (l' : list B) (k : nat),
       All2i (λ (i : nat) (x : A) (y : B), R i x (g x y)) k xs l'
       → All2i R k xs (map2 g xs l')
y : B
ys : list B
k, z1' : nat
z1'0 : list A
z1 : list B
z : All2i (λ (i : nat) (x : A) (y : B), R i x (g x y)) z1' z1'0 z1

Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2i
                                     (λ (i : nat) (x : A) (y : B),
                                        R i x (g x y)) z1' z1'0 z1)"
in
environment:
A : Type
B : Type
C : Type
R : nat → A → C → Type
g : A → B → C
x : A
xs : list A
ih : ∀ (l' : list B) (k : nat),
       All2i (λ (i : nat) (x : A) (y : B), R i x (g x y)) k xs l'
       → All2i R k xs (map2 g xs l')
y : B
ys : list B
k, z1' : nat
z1'0 : list A
z1 : list B
z : All2i (λ (i : nat) (x : A) (y : B), R i x (g x y)) z1' z1'0 z1

Level 2: evaluation
raised the exception
Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2i
                                     (λ (i : nat) (x : A) (y : B),
                                        R i x (g x y)) z1' z1'0 z1)"
in
environment:
A : Type
B : Type
C : Type
R : nat → A → C → Type
g : A → B → C
x : A
xs : list A
ih : ∀ (l' : list B) (k : nat),
       All2i (λ (i : nat) (x : A) (y : B), R i x (g x y)) k xs l'
       → All2i R k xs (map2 g xs l')
y : B
ys : list B
k, z1' : nat
z1'0 : list A
z1 : list B
z : All2i (λ (i : nat) (x : A) (y : B), R i x (g x y)) z1' z1'0 z1


Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2i
                                     (λ (i : nat) (x : A) (y : B),
                                        R i x (g x y)) z1' z1'0 z1)"
in
environment:
A : Type
B : Type
C : Type
R : nat → A → C → Type
g : A → B → C
x : A
xs : list A
ih : ∀ (l' : list B) (k : nat),
       All2i (λ (i : nat) (x : A) (y : B), R i x (g x y)) k xs l'
       → All2i R k xs (map2 g xs l')
y : B
ys : list B
k, z1' : nat
z1'0 : list A
z1 : list B
z : All2i (λ (i : nat) (x : A) (y : B), R i x (g x y)) z1' z1'0 z1

Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2i
                                     (λ (i : nat) (x : A) (y : B),
                                        R i x (g x y)) z1' z1'0 z1)"
in
environment:
A : Type
B : Type
C : Type
R : nat → A → C → Type
g : A → B → C
x : A
xs : list A
ih : ∀ (l' : list B) (k : nat),
       All2i (λ (i : nat) (x : A) (y : B), R i x (g x y)) k xs l'
       → All2i R k xs (map2 g xs l')
y : B
ys : list B
k, z1' : nat
z1'0 : list A
z1 : list B
z : All2i (λ (i : nat) (x : A) (y : B), R i x (g x y)) z1' z1'0 z1

Level 1: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2i
                                     (λ (i : nat) (x : A) (y : B),
                                        R i x (g x y)) z1' z1'0 z1)"
in
environment:
A : Type
B : Type
C : Type
R : nat → A → C → Type
g : A → B → C
x : A
xs : list A
ih : ∀ (l' : list B) (k : nat),
       All2i (λ (i : nat) (x : A) (y : B), R i x (g x y)) k xs l'
       → All2i R k xs (map2 g xs l')
y : B
ys : list B
k, z1' : nat
z1'0 : list A
z1 : list B
z : All2i (λ (i : nat) (x : A) (y : B), R i x (g x y)) z1' z1'0 z1

Level 1: evaluation
raised the exception
Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2i
                                     (λ (i : nat) (x : A) (y : B),
                                        R i x (g x y)) z1' z1'0 z1)"
in
environment:
A : Type
B : Type
C : Type
R : nat → A → C → Type
g : A → B → C
x : A
xs : list A
ih : ∀ (l' : list B) (k : nat),
       All2i (λ (i : nat) (x : A) (y : B), R i x (g x y)) k xs l'
       → All2i R k xs (map2 g xs l')
y : B
ys : list B
k, z1' : nat
z1'0 : list A
z1 : list B
z : All2i (λ (i : nat) (x : A) (y : B), R i x (g x y)) z1' z1'0 z1


Level 1: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2i
                                     (λ (i : nat) (x : A) (y : B),
                                        R i x (g x y)) z1' z1'0 z1)"
in
environment:
A : Type
B : Type
C : Type
R : nat → A → C → Type
g : A → B → C
x : A
xs : list A
ih : ∀ (l' : list B) (k : nat),
       All2i (λ (i : nat) (x : A) (y : B), R i x (g x y)) k xs l'
       → All2i R k xs (map2 g xs l')
y : B
ys : list B
k, z1' : nat
z1'0 : list A
z1 : list B
z : All2i (λ (i : nat) (x : A) (y : B), R i x (g x y)) z1' z1'0 z1

Level 0: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2i
                                     (λ (i : nat) (x : A) (y : B),
                                        R i x (g x y)) z1' z1'0 z1)"
in
environment:
A : Type
B : Type
C : Type
R : nat → A → C → Type
g : A → B → C
x : A
xs : list A
ih : ∀ (l' : list B) (k : nat),
       All2i (λ (i : nat) (x : A) (y : B), R i x (g x y)) k xs l'
       → All2i R k xs (map2 g xs l')
y : B
ys : list B
k, z1' : nat
z1'0 : list A
z1 : list B
z : All2i (λ (i : nat) (x : A) (y : B), R i x (g x y)) z1' z1'0 z1